2 Copyright (C) 2012 Carl Hetherington <cth@carlh.net>
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 /** @file src/transcoder.cc
21 * @brief A class which takes a Film and some Options, then uses those to transcode the film.
23 * A decoder is selected according to the content type, and the encoder can be specified
24 * as a parameter to the constructor.
28 #include <boost/signals2.hpp>
29 #include "transcoder.h"
31 #include "decoder_factory.h"
34 #include "delay_line.h"
37 #include "video_decoder.h"
38 #include "audio_decoder.h"
41 using boost::shared_ptr;
42 using boost::dynamic_pointer_cast;
44 /** Construct a transcoder using a Decoder that we create and a supplied Encoder.
45 * @param f Film that we are transcoding.
46 * @param o Decode options.
47 * @param j Job that we are running under, or 0.
48 * @param e Encoder to use.
50 Transcoder::Transcoder (shared_ptr<Film> f, DecodeOptions o, Job* j, shared_ptr<Encoder> e)
53 , _decoders (decoder_factory (f, o))
57 shared_ptr<AudioStream> st = f->audio_stream();
59 _matcher.reset (new Matcher (f->log(), st->sample_rate(), f->source_frame_rate()));
61 _delay_line.reset (new DelayLine (f->log(), f->audio_delay() / 1000.0f));
62 _gain.reset (new Gain (f->log(), f->audio_gain()));
64 /* Set up the decoder to use the film's set streams */
65 _decoders.video->set_subtitle_stream (f->subtitle_stream ());
66 if (f->audio_stream ()) {
67 _decoders.audio->set_audio_stream (f->audio_stream ());
70 _decoders.video->connect_video (_delay_line);
72 _delay_line->connect_video (_matcher);
73 _matcher->connect_video (_encoder);
75 _delay_line->Video.connect (bind (&Encoder::process_video, _encoder, _1, _2, _3));
78 _decoders.audio->connect_audio (_delay_line);
80 _delay_line->connect_audio (_matcher);
81 _matcher->connect_audio (_gain);
83 _delay_line->Audio.connect (bind (&Encoder::process_audio, _encoder, _1));
85 _gain->connect_audio (_encoder);
88 /** Run the decoder, passing its output to the encoder, until the decoder
89 * has no more data to present.
94 _encoder->process_begin ();
96 bool done[2] = { false, false };
100 done[0] = _decoders.video->pass ();
102 _decoders.video->set_progress (_job);
106 if (!done[1] && _decoders.audio && dynamic_pointer_cast<Decoder> (_decoders.audio) != dynamic_pointer_cast<Decoder> (_decoders.video)) {
107 done[1] = _decoders.audio->pass ();
112 if (done[0] && done[1]) {
118 _encoder->process_end ();
122 _delay_line->process_end ();
124 _matcher->process_end ();
126 _gain->process_end ();
127 _encoder->process_end ();